I don't know what it is about multi-color dice and me, but here I am loving this set of 200 (that is a lot) dice I picked up recently. Two-hundred dice is a lot, well, maybe it is not a lot if you are considering playing the new Tunnels and Trolls RPG, but there is something to having a big bucket of these and digging in to grab some for a roll. I don't need this many dice, but they are fun to play with, stack, stick your hand in, and pick a set of fresh ones out for each roll.
I like the colors too, when I am refereeing there is something very quick about having that color recognition going on in addition to the pattern recognition. Do our eyes recognize colors or patterns first? I would think colors, since maybe there is less brain activity needed to see a color than a pattern, though there are studies saying babies take several weeks to see their first color - but they can see light and dark before that (which would suggest patterns). But I like the color recognition, and it helps me sort the dice quickly.
I am trying to find some sort of standard for pip coloring, but there doesn't seem to be one - maybe. I have at least three sets here with different standards, so pick a brand and stick with it if you go colored pips. I do prefer the hotter, green yellows and reds to be the low numbers, while the cooler blues, purples and blacks are up at the high numbers.
These are also standard board-game sized dice, but they also sell the smaller 16mm type dice, with this set below (which I also like a lot):
You can see on this set the 4's are green while the 2's are yellow, when in the above the 4's are blue and the 2's are green. This set actually sticks to my color preferences better, but that is a minor point - once you get used to a set the color matching takes over in your head and it matters less. The edges of these are rounded, so they tend to roll a bit more versus board-game dice. These I can't "place" a roll on a table as well as I can dice with squarer sides. If I am playing a complex game where stray dice can knock pieces over, I will use dice that do not roll around as much.
Overall though, I love these dice and love using them at the table to speed up play. With either set you can't go wrong.